Sachin_dada has asked for the wisdom of the Perl Monks concerning the following question:

In Perl, i want to read the array that is actually passed from java. Could someone please tell me, how to send the arrays from java & read the array contents in Perl.

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Re: Java to perl
by Anonymous Monk on Oct 18, 2010 at 06:52 UTC
    serialize the array (say using YAML), communicate with perl process (STDIN/ARGV/file.yml), then in perl use YAML::Load to get at it.
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Re: Java to perl
by snape (Pilgrim) on Oct 18, 2010 at 08:06 UTC

    Passing of an array from Java into a Perl is generally done in the form of a scalar reference. There are many other ways but I would prefer scalar reference. Also you need to use the GetIntArrayElements -- which is a jni function which is used to convert the scalar into an array of integers.

    For example: 

    public class arrayforPerl {
  perl void max( int[] data ) {{
        # Get the array elements
        #
        my @arrPerl = GetIntArrayElements( $data );        
        my @arrMax = sort {$a <=> $b} @arrPerl;
        print "Max: $arrMax[$#arrMax]\n";
    }} ## double braces are for the perl code

    void maxProg() {
        int[] data = {101, 99, 42, 666, 23};
        max( data );
    }

    public static void main(String[] argv) {
        arrayforPerl javaPerl = new arrayforPerl();
        javaPerl.maxProg();
    }
}

    [download]

    I hope you can build on this

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